Improvement in knob-patch cutters



F. NOR RIS.

Knob Patchl Cutters.

Patented June 3o, 1874.

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UNITED STATES u PATENT OFFICE.

FREDERICK NORRIS, OF VAPPINGERS FALLS, NEWT YORK.

IMPROVEMENT IN KNOB-PATCH CUTTERS.

Specification forming part of Letters Patent No. 152,674, dated June 30, 1874; application led March 3, 1874.

To all lwhom it may concern Be it known that I, FREDERICK NoRRIs, of Wappingers Falls, in the county of Dutchess and State ot' N eW York, have invented an Iniproved Knob-Patch Cutter, ol' which the following is a specification The knob-patches of carriage-tops are frequently strengthened by a ring consisting of two pieces, to one of which are attached pins, which, passing through apertures punetured around the knob-hole, are, ou the other side of the material, clinched down upon the other portion of the ring.

My invention consists in a punch ot peculiar construction for the simultaneous punching ot' the knoh-holeand of the holes for the pins of such strengthening-ring.

In the drawing, Figure l is a'face View of the stock, with the cutters and knob-hole punch fixed therein. Fig. 2 is a section taken through the stock and longitudinally through the handle in the line x m, Fig. 1. Fig. 3 represents a knob-patch with strengtheningring, to facilitate the manufacture ot which knob-patch my invention is designed.

A is a metal stock, the face of which corresponds, or nearly corresponds, in size and shape, with that portion ot' the strengtheningring to which the pins are attached, and having a ring, f, for attaching` it to the handle D. G is the punch, secured in the face ofthe stock, and of the form required to make the knobhole shown at g, Fig. 3. c is the aperture in the punch and handle into and through which are forced, in punching, the pieces of material punched out. Y) are the cutters, also secured in the face of the stock, and of the requisite form for cutting the holes for the pins n c ot' the strengthening-ring shown in Fig. 3. The knob-punch c and the cutters b b are arranged in the same relation to each other and to the center of the face of the stock, Fig. 2., that the knob-hole g and the holes for the pins c bear to each other and to the center of the strengthening-rin g of the knob-patch, Fig. 3. A circle of the size of the face ot' the stock being marked at the desired point upon the material to be punched and cut, the operator, gaging by the outline of the stock, applies the knob-patchcutter so that the outline ofthe face ot' the cutter corresponds to the outline ot' the circle, and, applying the requisite pressure, the knob-hole and punctures are produced not merely in the desired position relative to each other, but also relatively to the inarliing, which result the operator could not, with ease and certainty, attain, unless the stock were constructed in such a forni and the punch and cutters in such a relation to the center thereof that the outline ofthe stock serves as a guide or gage.

What I claim as new, and desire to secure by Letters Patent, is-

The stock A, provided With the punch c and cuttersb, all arranged substantially as shown, for the purpose described.

- FRED. NORRIS.

Witnesses:

MICHAEL RYAN, VERNON H. HARRIS. 

